CN214742373U - Coal mine local ventilator silencing device - Google Patents
Coal mine local ventilator silencing device Download PDFInfo
- Publication number
- CN214742373U CN214742373U CN202023248891.2U CN202023248891U CN214742373U CN 214742373 U CN214742373 U CN 214742373U CN 202023248891 U CN202023248891 U CN 202023248891U CN 214742373 U CN214742373 U CN 214742373U
- Authority
- CN
- China
- Prior art keywords
- silencing
- square
- air inlet
- side plate
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Duct Arrangements (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a coal mine local ventilator silencing device, which comprises an upper air inlet silencer, wherein the upper air inlet silencer is connected with an air inlet silencer, the air inlet silencer is connected with a silencing diffusion cylinder, the upper air inlet silencer comprises an elbow silencing cylinder, one end of the elbow silencing cylinder is provided with an air inlet, the other end of the elbow silencing cylinder is fixedly connected with one square end of a square-round joint, and the round end of the square-round joint is fixedly connected with the air inlet silencer; the elbow silencing barrel comprises an upper arc plate, a lower arc plate, a first side plate and a second side plate; the first side plate and the second side plate are arranged in parallel and are fixedly connected with one square end of the square-round joint; the utility model discloses well combination noise is the characteristic of rectilinear propagation, sets up a plurality of water conservancy diversion noise elimination arcs that have certain radian, makes the noise that gets into elbow noise elimination section of thick bamboo along with the air current absorb by the noise reduction material of water conservancy diversion noise elimination arc, reaches and has promoted the noise reduction effect, has solved the great technical problem of auxiliary ventilating fan noise among the prior art.
Description
Technical Field
The utility model belongs to the technical field of mining machinery, a amortization in the pit is related to, concretely relates to colliery auxiliary ventilating fan silencing device.
Background
At present, a mechanical ventilation mode is widely adopted in mines in China, and fresh air is sent into a mining face and an underground chamber through a local ventilator, so that the air circulation of an operation environment and the occupational safety of operation personnel are ensured. However, the conventional local ventilator has high rotating speed and high rotating noise and eddy noise, so that the occupational safety of miners is influenced. The inlet of the local ventilator with the structure is directly communicated with the atmosphere, noise is directly transmitted to the environment, so that the noise in an underground roadway is increased, and the noise reduction effect is not obvious simply by increasing a shell noise elimination layer and prolonging the length of an axial noise elimination barrel air duct.
In the underground development, mining, transportation and loading processes of a coal mine, most workers need to participate, 4 cubic meters of air volume needs to be configured for each person per minute according to the coal mine regulation, the noise of an original local ventilator used in the coal mine is generally over 100 decibels, the damage to a human body is particularly large, and then the noise is reduced to about 100 decibels by covering and silencing the outer body of the original counter-rotating local ventilator through technical transformation, so that the difference between the noise and the environmental noise which is required by environmental protection is far below 85 decibels, and the requirement of a user cannot be met.
Disclosure of Invention
Not enough to prior art exists, the utility model aims to provide a colliery auxiliary ventilating fan silencing device solves the great technical problem of auxiliary ventilating fan noise among the prior art.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a coal mine local ventilator silencing device comprises an upper air inlet silencer, wherein the upper air inlet silencer is connected with an air inlet silencer, the air inlet silencer is connected with a silencing diffusion cylinder, the upper air inlet silencer comprises an elbow silencing cylinder, an air inlet is formed in one end of the elbow silencing cylinder, the other end of the elbow silencing cylinder is fixedly connected with one square end of a square-round joint, and one round end of the square-round joint is fixedly connected with the air inlet silencer;
the elbow silencing barrel comprises an upper arc plate, a lower arc plate, a first side plate and a second side plate; the first side plate and the second side plate are arranged in parallel and are fixedly connected with one square end of the square-round joint, the upper ends of the first side plate and the second side plate are provided with upper arc plates, and the lower ends of the first side plate and the second side plate are provided with lower arc plates;
a diversion silencing arc is arranged inside the elbow silencing cylinder, the radian of the diversion silencing arc is the same as that of the upper arc plate and the lower arc plate, the diversion silencing arc close to the upper arc plate is connected with the inner wall of the upper arc plate, and the diversion silencing arc close to the lower arc plate is connected with the inner wall of the lower arc plate;
porous plates are arranged on two sides of the flow guide silencing arc, and two ends of each porous plate are fixedly connected with the first side plate and the second side plate; and the flow guide silencing arc is filled with silencing materials.
The utility model discloses still have following technical characteristic:
specifically, a rectifying cap is coaxially arranged inside the square-round joint and the square-round joint, the bottom of the rectifying cap is parallel to the end face of the round end of the square-round joint, and the top of the rectifying cap is tangent to the end face of the square end of the square-round joint; the end face of the circular end of the rectifying cap and the square-round joint is provided with an annular air outlet.
Specifically, the air inlet is provided with a dust screen.
Specifically, a local ventilator to be silenced is fixedly arranged between the air inlet silencer and the silencing diffusion cylinder.
Specifically, a square lining ring is arranged between the elbow silencing tube and the square round joint.
Specifically, a plurality of rib plates are arranged between the rectifying cap and the inner wall of the square-round joint along the radial direction.
Specifically, go up air inlet silencer, wait to be silenced the local fan and the amortization diffusion section of thick bamboo between all through double flange structure and bolted connection.
Specifically, the perforated plate is fixedly connected with the first side plate and the second side plate through screws.
Preferably, the guide silencing arcs are multiple.
Optimally, the noise reduction material is selected from 24-40 kg/m3The glass wool of (1).
Compared with the prior art, the utility model, following technological effect has:
(I) the utility model discloses well combination noise is the characteristic of rectilinear propagation, sets up a plurality of water conservancy diversion noise elimination arcs that have certain radian for the noise that gets into elbow noise elimination section of thick bamboo along with the air current is absorbed by the noise cancelling material of water conservancy diversion noise elimination arc, thereby reaches the effect of making an uproar, has promoted the noise reduction effect, has solved the great technical problem of local fan noise among the prior art.
(II) the utility model provides a water conservancy diversion amortization arc makes the air current circulate through certain arc passageway, has avoided the air current to form the air current swirl in the elbow amortization section of thick bamboo, and simultaneously, the setting of water conservancy diversion amortization arc has also increased the area of contact of amortization material with the air current, makes the noise of ventilation blower be less than 85dB (A),
(III) the utility model provides an air intake is provided with the dust screen, and the debris in the air current have been filtered in the setting of dust screen, have kept the internal environment of muffler, have prolonged the life of equipment.
(IV) the utility model provides a noise damping material layer selects 24 ~ 40kg/m3The glass wool replaces the traditional silencing material layer, the absorption rate of noise is enhanced, the working efficiency of the side air inlet silencing device is improved, meanwhile, materials are saved, and the cost is reduced.
Drawings
Fig. 1 is a schematic overall structure diagram of a coal mine local ventilator silencing device.
FIG. 2 is a front cross-sectional view of an upper inlet silencer of a coal mine local fan silencer assembly.
FIG. 3 is a top view of an upper inlet silencer for a coal mine induced draft fan silencer assembly.
The meaning of the individual reference symbols in the figures is: 1-an upper air inlet silencer, 2-an air inlet silencer, 3-a silencing diffusion cylinder, 4-a porous plate, 5-a silencing material, 6-a rectifying cap, 7-an annular air outlet, 8-a dustproof net, 9-a local ventilator to be silenced, 10-a square lining ring, 11-a rib plate, 12-a double-flange structure, 13-a bolt and 14-a screw;
101-elbow silencing barrel, 102-air inlet, 103-square and round joint, 104-upper arc plate, 105-lower arc plate, 106-first side plate, 107-second side plate and 108-diversion silencing arc.
The following examples are provided to explain the present invention in further detail.
Detailed Description
It should be noted that all the components of the present invention are known in the art, and the components are not specifically described.
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
Example 1:
the embodiment provides a silencer for a local ventilator of a coal mine, which comprises an upper inlet silencer 1, wherein the upper inlet silencer 1 is connected with an inlet silencer 2, the inlet silencer 2 is connected with a silencing diffusion cylinder 3, the upper inlet silencer 1 comprises an elbow silencing cylinder 101, one end of the elbow silencing cylinder 101 is provided with an air inlet 102, the other end of the elbow silencing cylinder 101 is fixedly connected with one square end of a square-round joint 103, and the round end of the square-round joint 103 is fixedly connected with the inlet silencer 2;
the elbow silencing barrel 101 comprises an upper arc plate 104, a lower arc plate 105, a first side plate 106 and a second side plate 107; the first side plate 106 and the second side plate 107 are arranged in parallel and are fixedly connected with one square end of the square-round joint 103, the upper ends of the first side plate 106 and the second side plate 107 are provided with upper arc plates 104, and the lower ends of the first side plate 106 and the second side plate 107 are provided with lower arc plates 105;
a diversion silencing arc 108 is arranged in the elbow silencing cylinder 101, the radian of the diversion silencing arc 108 is the same as that of the upper arc plate 104 and the lower arc plate 105, the diversion silencing arc 108 close to the upper arc plate 104 is connected with the inner wall of the upper arc plate 104, and the diversion silencing arc 108 close to the lower arc plate 105 is connected with the inner wall of the lower arc plate 105;
porous plates 4 are arranged on two sides of the diversion silencing arc 108, and two ends of each porous plate 4 are fixedly connected with the first side plate 106 and the second side plate 107; the flow guiding muffling arc 108 is filled with a muffling material 5.
As a preferable scheme of this embodiment, a rectifying cap 6 is coaxially arranged inside the square-round joint 103 and the square-round joint 103, the bottom of the rectifying cap 6 is parallel to the end face of the round end of the square-round joint 103, and the top of the rectifying cap 6 is tangent to the end face of the square end of the square-round joint 103; the terminal surface of the circular one end of fairing cap 6 and square round joint 103 on be provided with annular air outlet 7, set up the fairing cap and can make the air current more smooth, be favorable to making an uproar.
As a preferable scheme of this embodiment, the air inlet 102 is provided with a dust screen 8, and the dust screen can prevent waste flying dust from entering the elbow silencing tube, which is beneficial to maintaining the internal environment of the silencer and also prolongs the service life of the device.
As a preferred solution of this embodiment, a local ventilator 9 to be muffled is fixedly installed between the intake silencer 2 and the muffling diffusion cylinder 3, mainly to fully embody the muffling process, and the specific structures of the intake silencer, the local ventilator, and the muffling diffusion cylinder are disclosed in the prior art.
As a preferable scheme of this embodiment, a square gasket 10 is provided between the elbow silencing tube 101 and the square-round joint 103, and the square gasket is provided, which mainly increases the fastening of the connection and enhances the sealing effect.
As a preferred scheme of this embodiment, a plurality of rib plates 11 are radially arranged between the fairing cap 6 and the inner wall of the square-round joint 103, and a plurality of rib plates are arranged, so that the device is more stable, and the stability of the device can be ensured under the condition of noise reduction when the airflow is large.
As a preferred scheme of this embodiment, all connect through double flange structure 12 and bolt 13 between last air inlet muffler 1, air inlet muffler 2, treat that amortization auxiliary ventilating fan 9 and amortization diffusion cylinder 3, the connected mode of double flange and bolt, simple and firm again accords with technical requirement.
As a preferable scheme of this embodiment, the perforated plate 4 is fixedly connected to the first side plate 106 and the second side plate 107 by screws 14, mainly to fix the radian of the sound-deadening material, so that the sound-deadening material can achieve a better sound-deadening effect.
As a preferable scheme of this embodiment, there are a plurality of diversion muffling arcs 108, and the diversion muffling arcs are provided with a plurality of diversion muffling arcs, so that the contact area between the muffling material and the airflow is increased, and the muffling effect is better.
As a preferable scheme of the embodiment, the sound attenuation material 5 is selected from 24-40 kg/m3The glass wool replaces the traditional silencing material layer, the absorption rate of noise is enhanced, the working efficiency of the side air inlet silencing device is improved, meanwhile, materials are saved, and the cost is reduced.
The utility model discloses a working process as follows:
airflow in a coal mine firstly passes through the dust screen 8, then enters a channel between different diversion noise-damping arcs 108 in the elbow noise-damping cylinder 101 from the air inlet 102, and because the spreading direction of the airflow is different from the radian of the diversion noise-damping arcs 108, the airflow can enter from the upper ends of the diversion noise-damping arcs 108, passes through the whole arcs, and finally enters the square-circle joint 103 from the lower ends of the diversion noise-damping arcs 108, and enters the air inlet silencer 2 from the annular air outlet 7 of the square-circle joint 103, noise reduction treatment is carried out in the air inlet silencer 2, then the airflow passes through the local ventilator 9 to be silenced and finally enters the noise-damping diffusion cylinder 3, and the noise in the airflow from the noise-damping diffusion cylinder 3 is obviously reduced.
Claims (10)
1. A coal mine local ventilator silencing device comprises an upper air inlet silencer (1), wherein the upper air inlet silencer (1) is connected with an air inlet silencer (2), and the air inlet silencer (2) is connected with a silencing diffusion cylinder (3), and is characterized in that the upper air inlet silencer (1) comprises an elbow silencing cylinder (101), one end of the elbow silencing cylinder (101) is provided with an air inlet (102), the other end of the elbow silencing cylinder (101) is fixedly connected with one square end of a square-round joint (103), and one round end of the square-round joint (103) is fixedly connected with the air inlet silencer (2);
the elbow silencing barrel (101) comprises an upper arc plate (104), a lower arc plate (105), a first side plate (106) and a second side plate (107); the first side plate (106) and the second side plate (107) are arranged in parallel and fixedly connected with one square end of the square-round joint (103), the upper ends of the first side plate (106) and the second side plate (107) are provided with upper arc plates (104), and the lower ends of the first side plate (106) and the second side plate (107) are provided with lower arc plates (105);
a flow guide silencing arc (108) is arranged inside the elbow silencing barrel (101), the radian of the flow guide silencing arc (108) is the same as the radians of the upper arc plate (104) and the lower arc plate (105), the flow guide silencing arc (108) close to the upper arc plate (104) is connected with the inner wall of the upper arc plate (104), and the flow guide silencing arc (108) close to the lower arc plate (105) is connected with the inner wall of the lower arc plate (105);
porous plates (4) are arranged on two sides of the flow guide silencing arc (108), and two ends of each porous plate (4) are fixedly connected with the first side plate (106) and the second side plate (107); the flow guide silencing arc (108) is filled with a silencing material (5).
2. The coal mine local ventilator silencing device according to claim 1, characterized in that a rectifying cap (6) is arranged in the square-round joint (103) and is coaxial with the square-round joint (103), the bottom of the rectifying cap (6) is parallel to the end face of the round end of the square-round joint (103), and the top of the rectifying cap (6) is tangent to the end face of the square end of the square-round joint (103); and an annular air outlet (7) is formed in the end faces of the circular end of the rectifying cap (6) and the square and round joint (103).
3. The coal mine local ventilator noise reduction device according to claim 1, characterized in that the inlet (102) is provided with a dust screen (8).
4. The coal mine local ventilator silencing device according to claim 1, characterized in that the local ventilator (9) to be silenced is fixedly arranged between the air inlet silencer (2) and the silencing diffusion cylinder (3).
5. The coal mine local ventilator noise reduction device according to claim 1, characterized in that a square gasket (10) is arranged between the elbow noise reduction cylinder (101) and the square-round joint (103).
6. The coal mine local ventilator noise reduction device according to claim 2, characterized in that a plurality of rib plates (11) are arranged between the fairing cap (6) and the inner wall of the square-round joint (103) along the radial direction.
7. The coal mine local ventilator silencing device according to claim 1, characterized in that the upper air inlet silencer (1), the air inlet silencer (2), the local ventilator (9) to be silenced and the silencing diffusion cylinder (3) are connected through a double-flange structure (12) and a bolt (13).
8. The coal mine local ventilator noise reduction device according to claim 1, characterized in that the perforated plate (4) and the first side plate (106) and the second side plate (107) are fixedly connected by screws (14).
9. A coal mine induced draft fan silencer assembly as claimed in claim 1 wherein there are a plurality of said flow directing muffling arcs (108).
10. The coal mine local ventilator noise reduction device according to claim 1, characterized in that the noise reduction material (5) is selected from 24-40 kg/m3The glass wool of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023248891.2U CN214742373U (en) | 2020-12-29 | 2020-12-29 | Coal mine local ventilator silencing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023248891.2U CN214742373U (en) | 2020-12-29 | 2020-12-29 | Coal mine local ventilator silencing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214742373U true CN214742373U (en) | 2021-11-16 |
Family
ID=78635283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023248891.2U Active CN214742373U (en) | 2020-12-29 | 2020-12-29 | Coal mine local ventilator silencing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214742373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738306A (en) * | 2022-05-07 | 2022-07-12 | 上海宝钢节能环保技术有限公司 | Efficient combustion-supporting fan applied to rotary hearth furnace process |
-
2020
- 2020-12-29 CN CN202023248891.2U patent/CN214742373U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738306A (en) * | 2022-05-07 | 2022-07-12 | 上海宝钢节能环保技术有限公司 | Efficient combustion-supporting fan applied to rotary hearth furnace process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214742373U (en) | Coal mine local ventilator silencing device | |
| CN101418820B (en) | Dispersion type noise deadener | |
| CN215566048U (en) | Nine-grid type silencer for fan | |
| CN213628058U (en) | Ultra-low noise high-efficiency axial flow fan | |
| CN207647804U (en) | A kind of filtering centrifugal fan structure | |
| CN110517722A (en) | A kind of novel environment friendly blimp | |
| CN215595959U (en) | Silencer of axial flow fan | |
| CN203516111U (en) | Noise insulation enclosure for roots blower | |
| CN211906948U (en) | Emptying silencer | |
| CN213020032U (en) | Noise eliminator for air conditioner outdoor unit | |
| CN214742370U (en) | Side air inlet silencing device for coal mine local fan | |
| CN105091006A (en) | Rain-proof noise eliminating funnel cap | |
| CN112377431A (en) | Ultra-low noise high-efficiency axial flow fan | |
| CN103470510A (en) | Roots blower sound-insulation cover | |
| CN210568694U (en) | Range hood with good smoking effect | |
| CN217652973U (en) | Flow-collecting side-air-intake flow-guiding type silencer | |
| CN213116873U (en) | Silencer for fan outlet | |
| CN218151673U (en) | Novel fan amortization device | |
| CN211474259U (en) | Diesel generating set with container housing | |
| CN211550055U (en) | Low-noise three-impeller disrotatory axial-flow local ventilator | |
| CN2567385Y (en) | Pressure return type intake noise silencer | |
| CN110404360A (en) | A kind of ultra-low noise deduster | |
| CN205316361U (en) | Boiler tail gas silencing device | |
| CN214897596U (en) | Noise eliminator of dust remover | |
| CN208546363U (en) | A kind of gas tunnel ventilation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |